Pump.



N. W. DAVIS.

PUMP. APPLICATION FILED JULY 3. 1914.

Patented July 13, 1915.

Q Attorneys TED STAES PATENT OFFICE.

NELsoN w. DAVIS, or 201m JEFFERSON, NEW YORK, Ass'reNon or ONE-HALIETO'.LorEEBEorHEns, or ron'r JEEEEnsoN, NEW YoEK.

A PUMP;

V Specification of Letters Patent. I

Patented July :13, 1915,

Application filed July 3, 1914. Serial N0.'848,998.

T all whom it may concern:

Be it known that I, NELsoN W. DAVIS, a citizen of the United States,residing at Port Jefferson, in the county of Suffolk and State of NewYork, have invented a new and useful Pump, of which the following is aspecificationr .The present invention appertains to pumps, and relatesmore'particularly to a pump for Artesian or deep wells.

The present invention contemplates the provision of a novel and improvedpump structure, adapted to be inserted down a well casing or pipe, andembodying unique means for anchoring the cylinderof the pump in placewithin the well casing and for closing the space between the pumpcylinder and well casing to prevent the collection of sediment orforeign matter therein.

Another object of the invention is to provide a stationary valve cagedetachably engaged within the pump cylinder in a unique manner, incombination with a reciprocatory valve cage of piston mounted in thecylinder above the stationary valve. cage and having unique meansengageable with the stationary valve cage, whereby" th'e'p'ump rodcarrying the reciprocatory valve cage may be manipulated to properlyinsert and secure. the

pump structure within-the well casing, to remove the stationary valvecage, or to remove the entire pump structure from the well casing. g

With the foregoing and other ob ects in view which will appear as thedescription proceeds, the invention-resides in the combination andarrangement of parts and in the details of construction hereinafterdescribed and claimed, it being understood that changes in the preciseembodiment of the invention herein disclosed. can be made within thescope of what is claimed without departing invention. The invention hasdrawing, wherein- Figure 1 is a longitudinal section of the pump asapplied within a well casing. Figs. 2 and 3 are enlarged crosssectionstaken on the lines 2-2 and 33, respectively, of-

Fig. 1.

In carrying out the present invention,

there isprovided a tubular pump cylinder or sleeve 1, which is onlyslightly smaller in diameter than the valve casing or p pe 2,

and which'is insertible downwardly into the said casing. A nipple 3; isthreaded into the lower end of the cylinder or sleeve 1, while a dogcoupling or cuff 4 is threaded .upon the lower end of the nipple 3. Thenipple 3 is provided with right and left hand threads at its ends whichengage the interior threads of the adjacent endsof the cylinder 1 andthe coupling or cuff '4. A pair .of looped dogs 45 have their endsriveted or otherwise secured within the lower end of the coupling orcuff 4,.and are adapted to frictionally engage the interior of the wellcasing 2 to prevent the rotation ofithe coupling or .cufi' 4 when thepump structure is inserted into the casing. Surrounding the intermediateportion of the nip 1e 3, is a compressible and expansible, gas et orring 6, of rubber or other suitable material, and' the edges of whichare adapted to abut or rest against the adjacent ends of the cylinder 1andcoupling 4. The-cylinder lispro vided at its upper end with an outerannular rabbet 7, withinwhioh is secured or mounted aring 8 of rubber orother expansible material which will expand snugly within-the casing 2toclo'se the upper end of the space between the cylinder ,1 and casing2.

A stationary valve cage or arched spider 9 is'disposed-within the lowerend portion of the cylinder or sleeve 1 directly above the nipple 3, andis provided with a lower annular valve seat 10, upon;which a suitablevalve -11-is normally seated. This valve 11 is confined within the cageor spider 9, to move to and from the seat 10. The valve seat or lowerannulus 10 of the valve cage 9 is equipped with a pairof diametricallyopposite depending fingers 12 which are provided-at their lower endswith oppositely extending hooks 13 engageable under the inwardlyprojecting lugs 14 secured to diaend of the pump rod 16 attached toitscrestportion; The cage or spider 15 is provided with the lowerannulus or valve seat 17 upon which a suitable valve 18 is normallyseated.

The valve 18 is confinedwithin the cage or v spider 15 to move. to andfrom thevalve seat 1 The valve seat or annulus 17 is equipped atdiametrically opposite points with depending fingers 19 which areprovided at their lower ends with double hooksor T- heads 20. Theindependent hooks or arms of the double hooks or'T-heads 20 are adaptedto engage under the arched arms of the cage or spider 9.

In assembling the parts of the pump, and in applying the pump within thevalve casing 2, supposing the several parts to be detached or separated,the nipple .3 1s first threaded into the lower end of the cylinder 1 andthe gasket or ring 6 placed upon the nipple. The coupling 1' is thenthreaded onto the lower end of the nipple 3, to such an extent, as tohold the gasket or ring6 between the adjacent ends of the cylinder 1 andcoupling 4; without spreading or expanding the gasket appreciably. Thevalve cage or spider 9 is then dropped into the cylinder 1 andmanipulated so that the hooks 13 thereof engage under the lugs 14 of thenipple 3. Finally, the valve cage or spider 15 is inserted into thecylinder 1, and the T-heads 20 are passed between the arms of the cageor spider 9 and swung to engage under certain of the said arms. Thedevice is then inserted into the well casing 2 and forced downwardlytherein to the point desired, the dogs 5 frictionally engaging theinterior of the casing 2 and preventing the rotation of the coupling orcuff 4:- Tt is also to be observed that the expansible ring 8 secured tothe upper end of the cylinder or sleeve 1 will expand snugly within thecasing 2 to close the upper end of the space between the cylinder 1 andeasing 2, The

pump rod 16 is then properly rotated, so as to rotate the valve cage orspider 9 in such a direction due to the engagement of the T- heads 20with the cage or spider 9, to cause the nipple 3 to be rotated fordrawing the cylinder 1 and coupling etoward each other 7 which Willcompress and expand the gasket 6 so that it engages tightly within thewell casing 2. Thus, the gasket 6 closes the lower end of the spacebetween the cylinder 1 and the casing 2, and also assists in anchoringthe cylinder within the well casing. The hooks 13 are so arranged, andthe screw threads of the upper and lowerends of the nipple 3 are such,that when the pump rod is rotated, as above noted, to expand the gasket6, the hooks 13 will. disengage the lugs 14, and the backs of thefingers 12 will come to rest against the lugs 1e when the cage or spider9 has rotated to one-half a revolution, to properly rotate the nipple 3with the cage or spider 9 for the expanding of the gasket 6. The cage orspider 15 is then detached from the cage or spider 9, by giving the pumprod 16 a slight turn, to disengage the T-heads 20 from the cage orspider 9, which will enable the cage or spider 15 to be raised andreciprocated for operating the pump in the usual manner in a device ofthe present character.

integers It is apparent thatthe reciprocatory cage or piston 15 may bewithdrawn from the cylinder 1 and casing 2 at any time by lifting orelevating the pump rod 16. Should it be desired to also remove thestationary cage or spider 9, this may be readily accomplished bylowering the cage or spider 15 so that the T-heads or double hooks 20project between the arms of the cage or spider 9. Then, by giving thepump rod 16 a proper turn to engage the T-heads or hooks 20 under therespective arms of the cage or spider 9, without engaging the hooks 13with the lugs 14, the said cage or spider 9 may be elevated with thecage or spider 15 so as to be removed from the cylinder and -wellcasing. Conversely, while the cage or spider 9 is engaged to the T-headsor hooks 20, the two cages or spiders may be simultaneously lowered intothe well casing and cylinder 1, to be replaced to their properpositions, as will be obvious from the foregomg.

When it is desired to remove the entire pump structure from the wellcasing, the cage or spider 15 is first engaged to the cage or spider 9,as above indicated, and the pump rod 16 is then properly turned torotate the cage or spider 9 in the proper direction to engage the hooks13 under the lugs 14 of the nipple 3. Then, by lifting the pump rod 16,the cage or spider 9 will not only be lifted by the cage or spider 15,but the nipple 3 and consequently the cylinder 1 and coupling 4 will beelevated therewith, it being preferable, prior to the removal of thepump, to give the nipple 3 a few turns in the proper direction to loosenthe coupling 4 slightly for enabling the gasket 6 to contract.

With the present pump, the cylinder 1 may occupy the greater portion ofthe space within the corresponding portion of the well casing 2, toreduce to a minimum the space between the cylinder 1 and the wellcasing. It is also to be noted that the expansible ring 8 at the upperend of the cylinder 1, prevents the sediment or foreign matterfrom-precipitating or accumulating within the space between the cylinder1 and well casing.

The present pump requires no special tools to insert or withdraw theseveral parts thereof, and the present pump reduces to a minimum, theamount of labor and time necessary for applying and removing the parts.The present invention also prevents the parts of the pump from beinglost with in the well casing and the present device is of advantage inother obvious respects, which need not be enumerated.

Having thus described the invention, what is claimed as new is:

1. In a pump, a cylinder, a nipple threaded into the lower end thereof,a dog coupling threaded onto the lower end of the nipple, an expansiblegasket surrounding the nipple between the adjacent ends of the cylinderand coupling, and a valve cage disposed within the cylinder directlyabove the nipple, the valve cage and'nipple having interengageablemeans.

2. In a pump, a cylinder, a nipple threaded into the lower end thereof,a dog coupling .threadedonto the lower end of the nipple, an expansiblegasket surrounding the. nipple between the adjacentends of the cylinderand coupling, a valve cage disposed within the cylinder .directly abovethe nipple, the nipple having inner lugs, and the valve cage havingdepending fingers provided with hooks at their lower ends engageableunder the said lugs.

3. In a pump, a cylinder, a nipple threaded into the lower end thereof,a gasket carried by the nipple and adapted to bear.

against the lower endof the cylinder, a stationary valve cage mountedwithin the cylinder directly above the nipple, the nipple and stationaryvalve cage having means adapted" to interengage when the cage is rotatedin one direction, and a reciprocatory valve cage mounted within thecylinder above the stationary valve cage, the two valve cages havingportions adapted to interengage when the reciprocatory valve cage.

is'rotated in either direction.

4; In a pump, a cylinder, a nipple threaded into the lower end thereof,a gasket ca'rried by the nipple and seatable against the lower end ofthe cylinder, and a valve cage mounted within the cylinder above thesaidnipple, the nipple having inwardly projecting lugs, and the valve cagehaving depending fingers provided with hooks at their lower endsengageable under the said lugs.

5. In a pump, a cylinder, a nipple threaded into thelower end thereof, agasket car-' ried by the nipple and seatable against the lower end ofthe cylinder, a stationary valve cage mounted within the cylinder abovethe said nipple, the nipple having inner lugs, and the stationary valvecage having depending fingers provided with hooks engageable under thesaid lugs, and a reciprocatory valve cage mounted within the cylinderabove the stationary valve cage and having depending fingers providedwith -T-heads engageable with the stationary valve cage.

6. In a pump, a cylinder, an expansible gasket carried by the lower endthereof, It

means carried at the lower end of the cylinder for expanding the gasket,and an expansible ring carried by the upper end of the cylinder. Intestimony that I claim the foregoing as my own, I have hereto afiixed mysignature in the presence of two witnesses.

. v NELSON W. DAVIS. Witnesses:

G. F... HALLooK, A. JAY TEFFT.

